Plow.



e. PFANNENMULLER.

PLOW.

APPLICATION FILED SEPT. 3. 1913.

Patented NOV. 2, 1915. Y

amt Mm Prow 7 Specification of Letters Patent.

Patented Nov. 2, 1915.

Application filed September 3, 1913. Serial No. 787,923.

The first object of my invention is to pro-- vide a plow the moldboards of which take up automatically the operative position.

A further object of my invention is to make the moldboards adjustable so that the breadth of the strips of land swept by the moldboards may be easily varied.

In known plows the swinging moldboards either are pivotally connected with fixed moldboards and secured by screws or they are mounted upon a separate axle and stopped by a bolting device arranged on the plowbeam.

According to my invention the swinging moldboards move automatically against the inner side of the fixed moldboards under the pressure of the earth.

I will not proceed to describe my invention with reference to the accompanying drawings, in which Figure 1 is a side elevation of a swivelplow, part of the one fixed moldboard being broken away, and Flg. 21s a plan view of the plow, part of the same being shown in section on the line 22 of Fig. 1. Fig. 3 is a detailed view of a portion of the plow showing the adjusting pin in detail.

In the drawing, the numerals 1, 1 denote beams, 2, 2 are the fixed moldboards mounted on the end of the beam 1, 1. In the middle of the beam are provided eyes 3 carrying an axle 4, upon which is mounted the tiebeam 5. Fastened to the beam are an upper and a lower frame 6, 7, the corners of which are extended to plates 8, 9. To these plates are pivotally connected an upper and a lower bracebar 11, 12 by means of the axle 10, and moldboards 13, 14 are fastened to the ends of the said brace-bars. Therefore the moldboards 13, 14 swing around the axle 10. The swinging moldboards being oppositely disposed extend forward over the rear edges 15 of the fixed moldboards 2, 2 when applied to these moldboards. The forward ends of the swinging moldboards are bent backward in 18, 18 to such an extent that the operative surface of the fixed moldboards is flush with the surface of the swinging mold boards. The part of the swinging moldboards extending backward over the axle 8 is considerably longer than the part extending forward. Since the pressure of the earth acting upon the rear portion of the swinging mold boards affects the forward portions thereof, it follows that the movable mold boards adjust themselves with relation to the fixed mold boards when the plow is forced into the earth.

In order to vary the breadth of the strips of land to be swept by the swinging moldboards there are provided in the forward ends of the said moldboards screw-bolts 16, 16 the ends of which rest against the rim of the fixed moldboards, which is strengthened by a band 17. The more the bolts are screwed in the moldboards, the greater is the distance between the fixed moldboards and the forward end of the swinging moldboards and the more swings outward the rear end of these moldboards so that, by turning the said screw-bolts, the breadth of the strips of land may be varied.

An essential advantage of my construction consists in the fact that the swinging moldboards may be easily replaced.

It will be understood that, while I have described a swivel-plow, I do not desire to be limited to plows of this matter and to the details of construction, but that simple plows and modifications of the construction would be within my invention.

Having now described my invention, what I claim is:

1. A plow comprising a frame, a plow beam on the frame, a mold board fixed to each end of the beam, movable mold boards, means for connecting the movable mold boards, means for pivotally connecting the movable mold boards to the frame, whereby one end of each mold board may be moved into engagement with the respective stationary mold boards, and means carried by each movable mold board for adjusting the movable mold boards with relation to the stationary mold boards.

2. A plow comprising a frame, stationary mold boards, and the frame movable mold boards, associated with the stationary mold boards, means for connecting the movable mold boards, a band secured to one end of able mold boards with relation to the staeaoh of the movable mold boards, said band tionary mold boards: 7 a 10 providing an offset porti011,'means for piv- In testimony whereof I atfix my signature otally connecting the movable moldboards in'presence of two witnesses. V

1 to the frame whereby the ofiset portion of GOTTLIEB PFANNENMULLER.

the respective movable mold boards engage Witnesses: one end of the respective stationary mold J USTUS HAVEMANN',

boards and means for adjusting the mov OSCAR Boon.

Copies of this patent may be obtained for five cents each,'by addressin the commissioner-of Patents,

Washington, D. G. r a 

